File:Star trails over the VLT in Paranal.jpg
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English: This image was taken by Babak A. Tafreshi, one of ESO’s Photo Ambassadors, at ESO’s Paranal Observatory. It shows three of the four Auxiliary Telescopes (ATs) of the Very Large Telescope Interferometer (VLTI). Above them, the long bright stripes are star trails, each one marking the apparent path of a single star across the dark night sky, due to the rotation of the Earth. This technique also enhances the natural colours of the stars, which gives an indication of their temperature, ranging from about 1000 degrees Celsius for the reddest stars to a few tens of thousands of degrees Celsius for the hottest, which appear blue. The sky in this remote and high location in Chile is extremely clear and there is no light pollution, offering us this amazing light show.
Deutsch: Dieses Bild wurde von ESO-Fotobotschafter Babak A. Tafreshi am Paranal-Observatorium der ESO aufgenommen. Es zeigt drei der vier Hilfsteleskope (engl. Auxiliary Telescopes, kurz ATs) des Very Large Telescope Interferometers (VLTI). Über ihnen sind lange helle Streifen zu sehen, sogenannte Strichspuren. Jede dieser Spuren markiert den Weg eines einzelnen Sterns über den dunklen Nachthimmel, der durch die Erdrotation verursacht wird. Diese Technik verdeutlicht außerdem die natürlichen Farben der Sterne, die für deren Temperatur stehen. Tiefrote Sterne erreichen etwa 1000°C während die heißesten Sterne bis zu einigen zehntausend Grad aufweisen und blau erscheinen. Der Himmel an diesem abgelegenen und hochgelegenen Ort in Chile ist sehr klar und frei von Lichtverschmutzung, weshalb wir dieses beeindruckende Lichtspektakel sehen können. Español: Esta imagen fue obtenida por Babak A. Tafreshi, uno de los Fotógrafos Embajadores de ESO, desde el Observatorio Paranal de ESO. Pueden verse tres de los cuatro Telescopios Auxiliares (Auxiliary Telescopes, ATs) del VLTI (Very Large Telescope Interferometer). Sobre ellos, los largos trazos brillantes son estelas de estrellas, y cada una parece marcar el camino aparente de una estrella a través del oscuro cielo nocturno, provocado por la rotación de la Tierra. Esta técnica también resalta los colores naturales de las estrellas, dando una indicación de su temperatura, que oscila entre los 1.000 grados Celsius para las estrellas más rojas y las pocas decenas de miles para las más calientes, que aparecen azules. En esta remota zona de Chile, de gran altitud, el cielo es extremadamente claro y no hay contaminación lumínica, de ahí el regalo de este magnífico espectáculo de luz.
Italiano: Quest’immagine è stata ripresa da Babak A. Tafreshi, uno dei Ambasciatori Fotografi dell'ESO, all’osservatorio Paranal di ESO. Essa mostra tre dei quattro telescopi ausiliari dell’interferometro del Very Large Telescope Interferometer (VLTI). Le lunghe strisce luminose sopra i telescopi sono le scie lasciate delle stelle. Ognuna di esse traccia la traiettoria apparente - dovuta alla rotazione della Terra - di una singola stella attraverso il buio cielo notturno. Questa tecnica fotografica amplifica i colori naturali delle stelle, che forniscono un’indicazione circa la loro temperatura. Essa è compresa tra circa 1000 gradi Celsius per le stelle più rosse fino a decine di migliaia di gradi Celsius per le stelle più calde, che appaiono blu. Il cielo, in questo remoto e alto luogo del Cile, è estremamente pulito e privo di inquinamento luminoso, e ci offre questo spettacolo di luci meraviglioso. |
| Date | |
| Source | http://www.eso.org/public/images/potw1350a/ |
| Author | ESO/B. Tafreshi |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:21, 17 December 2013 | | 6,144 × 4,096 (7.97 MB) | Stas1995 | User created page with UploadWizard |
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